Các bạn làm lời giải chi tiết giúp mik nhé

Các bạn làm lời giải chi tiết giúp mình nhé

Lao động giúp chúng ta như thế nào( liệt kê ra nhé) Ngắn quá hoặc dài quá là báo cáo đêý

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I. Complete the sentence with “a”, “an” or “the”: 1. What’s ___________ matter? Are you all right? 2. Kate has bought ___________ new car. 3. Some people think that ____________moon is made of cheese. 4. I’m collecting money for __________ poor. 5. Brian hasn’t found _______ job yet. 6. Can you play _______ guitar? 7. Don’t forget to turn off __________ television. 8. There’s ________ knife in ___________ second drawer. 9. There is __________ art museum in ___________ city center.

Complete the extract from a story. Use the correct form of the verbs in brackets. Sometimes more than one form is possible. She invited me (0) ….. to sit ….. (sit) down and then she excused herself from the room. I heard her (27) …………………………..………… (make) the tea in the kitchen and listened as she set out the cups and saucers. The room had begun (28) …………………………..………… (feel) a little odd and I regretted (29)……………………..………… (take) off my jacket. I noticed the fire (30) ………………………..……… (begin) to die down in the grate, watched second hand (31) …………………………..………… (move) slowly round the clock face and wondered how long it would be before she would allow me (32) …………………………..………… (leave). A few minutes later I heard the tea trolley (33) …………………………..………… (roll) on its wheels through the kitchen and then into the sitting room, where I was waiting. I started (34) …………………………..………… (drink) the tea she had poured for me and she let me (35) …………………………..………… (continue) in silence. I felt her (36) …………………………..………… (watch) me and looked up quickly, hoping to catch her (37) …………………………..………… (stare) at me, but she was looking instead at the cup of tea in my hand. Nervously, I sipped some more. It tasted slightly of bitter almonds but I carried on (38) …………………………..………… (drink) it to be polite. At last I finished the unpleasant brew and set my cup down in the saucer. ‘Would you like me (39) …………………………..………… (pour) you another cup?’ she asked. ‘No thank you,’ I said, reaching unsteadily for my briefcase. ‘I must be going if I expect (40) …………………………..………… (be) home in time for dinner.’

1 một hợp chất có công thức RO3.Bết rằng trong hợp chất của nó với hidro có công thức dạng H2R và H chiếm 5,88% khối lượng.Xá đingj R và vết các công thức hóa học trên 2.một hợp chất của nguyên tố R với O có dạng R2O5.Trong hợp chất của R với H có dạng RH3 .Trong đó R chiếm 82,3% khối lượng .Xác định R

Exercise 1: Rewrite each sentence as a positive, negative, or question: 1. At this time yesterday we (play) __________________ tennis in the schoolyard. 2. At 7:00 pm yesterday they (watch) ________________________ TV. 3. Yesterday while my father (watch) ________ TV, my mother (read) ___________ the newspaper, my sister (do) _____ her homework and I (play) ____ chess with my friend. 4. What were you doing when I phoned you? I (have) ____________________a bath. 5. She (do) __________________________her homework at the time yesterday. 6. Mary (water) ______________________the flowers at 3:00 p.m yesterday. 7. They (visit) __________________________the zoo at ten o’clock yesterday. 8. Peter and I (do) _____________________the exercise at this time last night. 9. Last night my father (feed) ________________________the pigeons at 7:00. 10. At this time last year we (learn) _______________________English in London _ Giúp mình với _

NHANH GIÚP EM Ạ 100 ml dung dịch A chứa Na2SO4 0,1M, K2SO4 0,2M phản ứng vừa đủ với 100 ml dung dịch B chứa Pb(NO3)2 0,1 M và Ba(NO3)2. Tính nồng độ mol của Ba(NO¬3)2 trong dung dịch và khối lượng chất kết tủa thu được sau phản ứng giữa 2 dung dịch A và B.